The 2011–12 División de Honor was the 45th season of the top flight of the Spanish domestic rugby union competitions since 1953. It began in autumn 2011 and finished on May 12 with the Final. Valladolid won the title, while Alcobendas were relegated to División de Honor B.
Competition format
The season took place between September and March, with every team playing each other home and away for a total of 18 matches. Points were awarded according to the following:
4 points for a win
2 points for a draw
1 bonus point for a team scoring 4 tries or more in a match
1 bonus point for a team that loses a match by 7 points or fewer
The six teams with the highest number of points at the end of 22 rounds of matches played the championship playoffs. The top two teams win a semifinal berth automatically, while the next four teams played off to take the remaining two spots.
The club which finished bottom went into a playoff with a team from División de Honor B. Up to three teams would be promoted in order to increase the number of teams in the División de Honor to 12.
The relegation playoff was contested over two legs by Alcobendas, who finished 10th in División de Honor, and Hernani, the losing team from División de Honor B promotion playoff final. Hernani won the tie, winning 27-24 on aggregate.